Initial whack at using the new, superior zooming technology on the
MIDI stuff...
Automagically scale with the editor size...
Fix piano roll not sizing correctly when opening a new item(s)
Part one of overhauling automation zoom...
Various fixes to line drawing...
Begin rescoping some variables so that the automation viewers can
scale independently...
Scale the automation viewers with their width.
Height scaling for automation editors...
Various fixes, perhaps even merge-worthy...